Blood pressure and hypertension prevalence among oldest-old in China for 16 year: based on CLHLS

BMC Geriatrics

Table 3 General characteristic of the seven survey waves

Wave	Total population	Total oldest-old	Excluded oldest-old due to missing information	Included population	Mean age	Male (%)
1998	9093	8959	265	8694	92.3 ± 7.6	39.7
2000	11,200	11,162	354	10,808	91.3 ± 7.5	41.6
2002	16,064	11,175	102	11,073	92.6 ± 7.6	39.4
2005	15,638	10,658	160	10,498	92.8 ± 7.2	39.2
2008	16,540	12,002	701	11,301	92.7 ± 7.4	39.4
2011	9765	6530	129	6401	92.2 ± 7.7	40.2
2014	7192	4738	151	4587	91.3 ± 7.6	41.3

ISSN: 1471-2318